May I offer a different view? A few things to consider:
Many people homeschool and do so because the child receives one on one attention. Traveling also provides quality time for the parents and children. So yes the child/children will be missing seat time but I truly believe there are valuable lessons to be learned traveling - even if it is to WDW or DL. There are many life skills that come into play: Budgeting, time management, anger management

, negotiations, learning about other cultures et
It IS a pain to do bring homework and make sure it's completed and yes, it's extra work for the teacher, but I believe it is often worth it.
I work in my dd class each week. I'm willing to come in and organize, copy and do whatever the teacher needs me to do to get my child's work.
Also not every family has parents who work 9-5. My husband is a tugboat captain and is often gone EVERY night in the summer. We travel when we can which is not necessarily convenient for the school system but it's when we can be together as a family.
Just another point of view
Pirate Girl